Drop that phone! Now, a device for the net-addicted

From browsing social media to watching videos and chatting with friends, Indonesian university student Tyas Sisianindita spends about eight hours a day on her phone. “I realise that I am addicted,” the university student admitted, saying she checks her phone continuously from the time she wakes up, even when she is in classes.
A group of fellow students at the University of Indonesia, led by inventor Irfan Budi Satria, has spent three months developing a wearable device that can help internet users like Sisianindita cut down on the time they spend flicking at their phones
Called “Nettox”, from “internet detox”, the device is worn on the wrist and contains a pulse oximeter sensor that measures hemoglobin oxygen levels and heart rate variability (HRV). Studies have found that prolonged mobile phone usage has a specific lowering effect on HRV levels. The Nettox device emits a sound when HRV and blood oxygen levels fall within this range, which reminds the wearer to stop using their phone.